Western Digital Ultrastar DC HC310 - Table 234 SMART Log Directory; Table 235 SMART Summary Error Log Sector

273
Western Digital Hard Disk Drive OEM Specification
11.51.4 SMART Log Directory
Table 234 defines the 512 bytes that make up the SMART Log Directory. The SMART Log Directory is SMART Log
Address zero and is defined as one sector long.
Description
Bytes
Offset
SMART Logging Version
2
00h
Number of sectors in the log at log address 1
1
02h
Reserved
1
03h
Number of sectors in the log at log address 2
1
04h
Reserved
1
05h
…
…
…
Number of sectors in the log at log address 255
1
1Feh
Reserved
1
1FFh
512
Table 234 SMART Log Directory
The value of the SMART Logging Version word shall be 01h. The logs at log addresses 80-9Fh shall each be defined
as 16 sectors long.
11.51.5 SMART summary error log sector
The following defines the 512 bytes that make up the SMART summary error log sector. All multi-byte fields shown in
this data structure follow the ATA/ATAPI-7 specifications for byte ordering.
Description
Bytes
Offset
SMART error log version
1
00h
Error log index
1
01h
1
st
error log data structure
90
02h
2
nd
error log data structure
90
5Ch
3
rd
error log data structure
90
B6h
4
th
error log data structure
90
110h
5
th
error log data structure
90
16Ah
Device error count
2
1C4h
Reserved
57
1C6h
Data structure checksum
1
1FFh
512
Table 235 SMART summary error log sector
11.51.5.1 SMART error log version
This value is set to 01h.
11.51.5.2 Error log index
This points the most recent error log data structure. Only values 1 through 5 are valid.
11.51.5.3 Device error count
This field contains the total number of errors. The value will not roll over.